Optimization of Tensile Properties Based on Spin Tool Shoulder Geometry for Friction Stir Welded 6061 Aluminum Alloy

Abstract:

This study reported the statistical optimization based on Taguchi designed experiments to improve the tensile properties of 6061 Aluminum alloy by the friction stir welding (FSW) experiments. The morphology and the structure of the friction stir welded experiments were characterized by scanning electron microscopy. Based on analysis of variance, the impacts of control factors have been identified for the tensile strength of 6061 aluminum alloy by friction stir welding. Experimental results revealed that the defect free butt joints could be obtained by cylindrical-screw type of tool shoulder and the joints made with a cylindrical-screw type resulted in better tensile properties compared to the other two shoulder geometries. Furthermore, it was clear that the tensile properties are greatly improved by friction stir welded experiments in the Taguchi design, and these findings have achieved the desired values in regard to the friction stir welded Experiments. The proposed procedure was applied at friction stir welded experiments, and the implementation results demonstrated its feasibility and effectiveness to enhance the tensile properties by FSW .

• Periodical: Applied Mechanics and Materials (Volumes 568-570)
• Pages: 1680-1683
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.568-570.1680
• Online since: June 2014
• Authors: Ming Der Jean
• Keywords: Friction Stir Welding (FSW), Spin Tool Shoulder, Tensile Optimization, Tensile Properties

References

[1] R.S. Mishra and Z.Y. Ma. Friction stirring welding and processing, Materials Science and Engineering R50. pp.1-78, (2005).

[2] C. G Rhodes. M. W Mahoney. W.H. Bingel, R.A. Spurling and C.C. Bampton. Effects of friction stir welding on microstructure of 7075 aluminum. Scripta Materialia; 36( l) PP. 69-75, (1997).

DOI: 10.1016/s1359-6462(96)00344-2

[3] H. Jin, S. Saimoto, M. Ball and P.L. Threadgill, Characterisation of microstructure and texture in Friction Stir Welding joints of 5754 and 5182 aluminum alloy sheets, Materials Science and Technology, Vol. 17, pp.1605-1614, (2001).

DOI: 10.1179/026708301101509674

[4] Ying Li, L.E. Murr and J.C., Solid-state flow visualization in the friction stir welding of 2024 Al to 6061 Al, February 15, (1999).

DOI: 10.1016/s1359-6462(99)00062-7

[5] Y.S. Sato, M. Urate, H. Kokawa and K. Ikeda, Hall-Petch relationship in friction stir welds of equal channel angular-pressed aluminum alloys, Mater. Sci. Eng. A 354, 2003, pp.298-305.

DOI: 10.1016/s0921-5093(03)00008-x

[6] W.M. Thomas, P.L. Threadgill, Vol. and E.D. Nicholas, The feasibility of friction stir welding steel, By Slightly modified version published in Science and Technology of Welding and Joining, Vol. 4, No. 6, pp.365-372, (1999).

DOI: 10.1179/136217199101538012

[7] W.M. Thomas, E.D. Nicholas, E.R. Watts, and D.G. Staines, Friction based welding technology for aluminum, TWI Ltd, Granta Park, Great Abington, Cambridge, CB16AL, UK Paper presented at The 8th International Conference on Aluminum Alloys, 2nd to 5th July (2002).

[8] J. Russell, Friction Stir Welding of titanium alloys, TWI Ltd, Cambridge, UK Paper presented at 10th World Conference on Titanium, Hamburg, 13-18 July (2003).

[9] Y. Li, L.E. Murr and J.C. McClure, Flow visualization and residual microstructures with the friction-stir welding of 2024 aluminum to 6061 aluminum, Mater. Sci. Eng. A271, pp.213-223, (1999).

DOI: 10.1016/s0921-5093(99)00204-x